Mining-engine



(N0 Model V B. YOOH.

MINING ENGINE.

Patented Jan. 3,1882.

Fig

N. PETERS, Plwla-Lilbogmpher. Waslling'hm. ac.

UNITED STATES PATENT OFFICE.

'BENH ED YOOH, or WEST BELLEVILLE, ILLINOIS.

MlNlNG -ENGiNE.

SPECIFICATION formingpart of Letters Patent 1\TQ. 251,987, dated January 3, 1882.

Application filed September 24, 1881. (Noinodell) To all whom, it may concern: Beit known that I, BENHARD Yoorr, of West Belleville, St. Clair county, Illinois, have invented a certain new and useful Improvement in Mining-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanyingdrawings, making part of this specificatiom u My inventionis an improvement on the miningmachine patented to me 7th June, 1881, No.

My present invention applies to an im provement on the slide-valve of the main engine and to the addition of a check-valve to the end ports, and also to an automatic device or scraper for clearing the channel or holes formed by the drills from the dislodged material.

Reference is made to my former patent for a general description of the machine.

In the drawings,Figure 1 is a longitudinal section through the valve-chest and partof the cylinder'A at 1 1, Fig. 2, and part in section in the plane of one of the piston-rods of the main cylinderA. Fig. 2 is a horizontal section of the valve-chest and val ve-operating'engine at 2 2, Fig. 1. Fig. 8 is an enlarged detail section at line 1 1 of the check-valve and adjacent parts. Fig. 4 is an enlarged top view of a drill-head with myimproved scraper applied thereto, and Fig. 5 is a side view of same. Fig. 6 is a perspective view of the drill head made with four drill-sockets. Fig. 7 is a perspective view of part of the automatic scraper. Fig. 8 is an axial section of-the valve-box, showing a modification of the valvein side View, and showing part of the main engine-cylinder in section.

A is the cylinder of the main engine, which is supported at A upon a bent wheel-axle, substantially like that described in my Patent No. 242,734. p i

B is the piston. The piston B contains a cylindrical-bore at G passing through it parallel with the piston-rod, in which plays'a piston, D. The piston D may be packed to fit the inside of thecylinder O snugly, soas to totally prevent, or almost wholly prevent, the passage of air; or the piston may be made to slide with more freedom in the cylinder and close tightly as a valve against seats at each end of its stroke to preventthe passage or waste ot'air, orboth of these means may be used to prevent waste. The piston D actuates the scraper by means of pistonrod E, connecting-rod F, and arm 20, as more fully described hereinafter.

G is the valve-chest, bored out at the ends G in cylindrical form, and containing pistonformed valves H, operating, as usual, to open and close the valve-ports a. Gompressed air through the pipes I enters the ends of the valvechest and passes into the cylinder through the ports (land a. The exhaust-air from the cylinder passes through the ports a into the central part ofthe valve-chest and escapes through the orifice g. y I

The valves H are fast upon the piston-rod J of the valve-operatic g engine, whose cylinder is shown at L and its piston at K.

M is the valve-chest of this engine, receiving compressed air from the same source as the main engine, and driven by air in the same manner, as shown.

The slide-valve of this engine is operated by means of a valve-rod by an eccentric, 0, upon the crank-shaft P. The cranks of shaft 1? are connected by rods Q to a cross-head, R, upon the combined piston and valve-rod J.

O is a fly-wheel upon the crank-shaft P.

It will be seen that the piston B is air-cushioned at the ends of its strokes, as the exhaustports a are situated at a distance from the ends ofthe cylinder, as in my former patent, and that there are end ports, a, in this improvement similarly situated to those in the former patcut; but the means for closing these ports a d dots in the two cases. In the former patent these ports were closed by slide-valves o. In my present improvement I place check-valves S in the ports a, such check-valves opening freely to allow the compressed air to enter the cylinder A, but closing to prevent the escape of air from the cylinder. The ports a enter the sides of the ports a, so that the pistonvalvesH serve to close both ports. Thus it will be seen that when the air isentering the cylinder A it enters througlrboth of the ports a and a, at one end of the cylinder, but that the air escapes from the cylinder only through the ports a, the imprisoned air acting as a cushion, as described in my former patent.

The piston B has two piston-rods, T, working in a guideframe or housing, U, and carrying at their ends a drill-head, V. The head V has four pick or drill sockets, 'v. Ordinarily I fit drills 11 into two of the sockets located opposite to each other. i The arrangement is such that the drills may be set in a vertical plane, as shown, or in a horizontal plane.

I will now describe the automatic scraper. This consists of a plate or frame, W, hinged to two of the sockets c, at 41 and lying flat against the back side of the drills in their forward movement, and then swinging away from the drills just before their backward movement, so as to draw out the dislodged material from the channel or hole made by the drills. The means for operating the scraper has been alluded to. It consists of the piston D,working in the open-ended cylinder 0, within the piston B, with the connection between the piston and the arm to of the scraper. When the compressed air enters the cylinder A behind the piston to cause the forward movement of the piston B, the air first drives forward the piston I), causing the scraper to lie flat against the back side of the drills, as shown, and the scraper maintains this position until the drills are about to take their backward movement. Then the air enters the forward end of the cylinder A before the piston B and first drives back the piston D, throwing out the scraper, as shown in broken lines in Fig. 4, and the loose material dislodged by the drills is drawn back from the channel or hole made by the drills.

In Fig. 8 is shown a modification in which the end ports, a, are only used for induction of air into the cylinder A, and the central ports,

a, only for exhaust. The action of the valves is clearly indicated by the drawings,where the movement of the piston B and the course of .5 the air are shown by arrows.

I claim as my invention- 1. The combination of cylinder A, having ports a a at its extreme ends, and spring check-valves S, parallel with 'the cylinder and 0 transverse of the ports, as set forth.

2. In a mining-engine, the combination of cylinder A, formed with induction-ports a (1, having spring check-valves S S, eduction-ports a a. valve-chest G, and piston B, as set forth. 45

3. The combination, with the drill-picks, of a scraper in contact with the drill in the forward movement and swung outward before the backward movement, for the purpose set forth.

4. The piston B, containing a cylinder, 0, 50 and piston D, operating the scraper W, substantially as set forth.

5. The piston B, containing a cylindrical bore, 0, and piston D, with rod E, working through the head of cylinder A.

BENHARD YOGH.

Witnesses:

SAML. KNIGHT, GEO. H. KNIGHT. 

